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Blackmar-Diemer Gambit Declined

Brombacher Countergambit

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  1. 1.d4d5
  2. 2.e4dxe4
  3. 3.Nc3Nf6
  4. 4.f3c5
1,159 games47%49%

Black's countergambit against the Blackmar-Diemer, answering 4. f3 with 4...c5 to hit d4 while keeping the extra pawn on e4; sharp and roughly even.

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About the Brombacher Countergambit

The Brombacher Countergambit answers 4. f3 with 4...c5. Black leaves the pawn on e4 and strikes at d4 instead of capturing on f3. The position can also arise from 3...c5 4. d5 Nf6 5. f3, a line resembling a reversed Albin Countergambit. White usually gains space with 5. d5, and play tends to continue 5...exf3 6. Nxf3, a line Efim Bogoljubow adopted. Engines give Black a slight edge, though practical results are close to even.

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